Pumping apparatus for viscous liquids



c. F. TPHAM PUMPING APPARATUS FOR VISCOUSA LQUIDS Filed' Feb. e, 1925Jan, 8, 1924.

Fatented dan. i924.

rasant CHARLES FRED T KOPHAM, OF COVENTRY, ENGLAND, ASSIGNOR TOCOURTULDS LIM- i ITIED, OF LONDON, ENGLAND, A BRITISH COMPANY.

rUMrmG APr'ARA'rUs Fon viscous moulins.

Application ledfebruary 6, 1923. Serial No. 617,315.

T all 'whom it mf/g/ Concern: A

Beit known Vthat l, Cuantas FRED Tor` HAM, a subject of the King ofGreat Britain, residing at The Gable, Holbrook Lane, Coventry, in thecounty of lVarwick, England, have -invented new and useful Improvementsin Pumping Apparatus for Viscous Liquids, of which the following is y aspecification.

This invention relates to apparatus of the type described in thespecification of British Letters Patent No. 17,876, A. D. 1907, theobject of the present invention being to provide an improved pump of the.15 said type which improved pump is very simple and inexpensive inconstruction and one which will operate very efficiently and with greatease. y

rfhe apparatus to which this inventionrelates comprises a cylindricalcasing having, rotatable in it, a cylindrical body with borings parallelwith its axis and constituting cylinders in which plungers are caused toreciprocate in such a way that the said plungers draw in the matterbeing pumped (such for instance as viscose bein used in the manufactureof artificial silk? and afterwards forceit out, as passages in thecylindrical body, communicating. with the cylinders therein,successively pass inlet and outlet passages in the casing. Ac-

cording to `this invention the plungers are reciprocated, eachpositively in both directions, by acam-plate rotating upon an vinclinedcam, or seating, at ythe end of the casing. The said plungers are hollowand each of them is provided with an internal` flexible, orlfiexiblyconnected, rod attached to the plunger near its head, the other end 49of the said rod being connected with the cam-plate so that theplungersare reciprocated by the cam-plate,the cam-plate being held toitsbearings on the inclined cam, or seating, bya central, and preferablyresiliently mounted, piece carried axially in the ,cylindrical body andbearing by spring' pressure upon th'e central part of the cam; plate,preferably with the intervention of a ball engaging a socket in thecam-plate.

The following descriptiono f a construction of pump in accordance withthis invention, together with the accompanying drawing, will makeclearer the nature of this invention, and explain how it can beperformed. but I do not limit myself to the precise details which arehereinafterdescribed.

In thedrawings, Figure 1 shews in vertical section'and Figure 2 intransverse section (on the line A B Figure l) suflicient of theapparatus in accordance with this invention.

The pump-casingv 1 is provided with concentric opposite passages 21 and22 (respectively in communication with the pump inlet 2 and the pumpoutlet 3) and contains the cylindrical body 4 capable of being rotated.in the said casing, by any usual, or suitable, means andy provided (inthe case illustrated) with three borings 5, 6`and 7, constitutingcylinders parallel with the axis of the casing .1 and cylindrical body.4, passages 8, 9 and 10 from the said cylinders 5, 6 and 7 comingsuccessively into communication with the said inlet 2 and outlet 3,through the pas- 75 sages 21 'and 22, as the cylindrical body 4,

is rotated. There is a tubular,for hollow, plunger 11 in each of thesaid cylinders,

'these plungers Abeing reciprocated so that they make theirsuction-strokes when in communication with the-inlet 2 land theirforcing, or discharge, strokes when' in communication with the outlet 3.Between the inner end of the cylindrical body 4, and the opposed end ofthe casing is a space and on the cover of the casing at this end is astationary cam, or inclined cam, seating, 12, opposite to the ends ofthe cylinders and plungers, and upon this cam, or seating, is mounted acam-plate lpcapable of rotation upon the said cam, or seating, 12. Eachplunger 11, is connected with thevcam-plate 13, by means of a flexiblerod 14, terminating in a spherical end-piece 15 which is seated in. acorresponding recess in the cam-plate 13 and retainedA therein by acover 1G secured to the cam-plate 13, by screws,for

.instance, the said .cover having openings in it through vwhich theflexible rods can pass,

the said openings being of a sizeless than 10 -The interiors of theplungers can be bored tapering inwards towards the ends .where the rods14 are connected, to 'atordspace to accommodate the fiexingmovementsofjheY plunger-rods. As the cam-plate 13- is ro-no ycess in thecentre 4of the camplate.

fated on the cam, or inclined seating, 12, the portions thereof to whichthe plungers are connected will successively approach to, and

recede from, the end of the cylindrical body 4, thereby positively anddirectly moving each of the plungers in both the suction and forcing, ordischarging, directions in the requisite order in their cylinders.

lt is :preferred to prolong the open endportion of the plungers 11 sothat in. all positions they protrude sufficiently from the cylinders toprevent the plunger-rods 14 from having too great deflection. I Thecam-plate' 13 can be maintained in contact with the cam, or inclinedseating, 12 by means of a piece 17 rojecting from an axial hole in thecylin rical body 4 and pressed outwards by a coiling spring 18, theprotruding end of the said' piece bearing upon a ball 19, which fits ina spherical elithough in the pump illustrated in the drawings, rotarymotion is transmitted from the rotating cylindrical body 4 to thecam-plate 13 through the medium of the plungers and plunger rods, theinvention is not necessarily limited to this precise method of causingthe cam-plate to rotate with the cylindrical body.

As in the other pumps of this type the cylindrical bod 4 has aprotruding shaiit 20, which can be riven by any suitable means to Workthe pump.

An opening 23, adapted for an air vessel, is shown in Figure 2 branchingoi'- from the passage 22 in communication with'the outlet 3.

The invention .is not limited to the precise details hereinbeforedescribed and illustrated as they can be varied without departing'fromthe nature of the invention; for inn stance, the lower'end of the umpmay be made adjustable, as shevvn in igure-6 of the `aforesaidspecifica-tion No. 17876, A. D.

1907; and a liner may be employed between the casinand the c llndricalbody, as illustrated in igure 5 o the said speciicatlon.

.With three borings constituting cylinders other numbers can be used,but it is preferred to have at least three of such cylinders.

What I claim is 1. In apparatus for pumping viscous liquids, a pumpcasing having inlet and outlet ports, a rotatable body itting Within thecasing, said body having longitudinally extending cylinder openings andassociated .ports, the latter "'suocesslvely establishing communicationwith the ports in the casing on the rotation of said bodywith respect tothe casing, hollow plungers reciprocating in said cylinder openings, thelength of said plungers being considerably greater lthan their diameter,a'otatable cam plate inclined to the axis of the rotatable body, androds'e'xtending from said hollow plungers and exibly connecting thelatter with the incl-ined cam plate, and means for rotating the bodymember within the casing to cause the hollow plungers to reciprocatebyreason of their connection with the cam plate.

2. In apparatus for pumpinfrl uids a pump casing having inl-et andoutletports, a rotatable body fitting within'the casing, said bodyhaving longitudinally extending cylinder openings and associated ports,thev latter successively establishing viscous liqcommunication with theports in the casing plungers being considerably greater than.`

their diameter, a rotatable cam plate in'- clined to the axis of therotatable body, and flexible rods extending from saidA hollow plunger-sto the inclined cam plate and ilexibly connected with the latter, andmeans for rotating the body member within the casing tocause the hollowplungers to reciprocate by reason of their connection with the cam.

3. In apparatus for pumping viscous liq uids, a pump casingl havingopposite bosses apertured to afford inlet and outlet ports, a rotatablebody fitting Within the casing, said body having longitudinallyextending cylinder openings and associated ports, the lattersuccessively establishing communication with the ports in the casing onthe rotation of said body with respect to the casing,` I

f 'therefrom toward .the heads of the hollow Although the pump describedis provided .plungers and connected thereto, and means for rotating thcbody member within the casing to cause the hollow plungers to re- J Amo.Lumi, Amun L Wann.

